package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/*菜品管理*/
@Slf4j
@RequestMapping("/dish")
@RestController
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
      log.info(dishDto.toString());
      dishService.saveWithFlavor(dishDto);

      /* // 清理所有菜品缓存数据.
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);*/

        // 清理某个分类下面的缓存
        String key = "dish" + "_" + dishDto.getCategoryId()+ "_" + dishDto.getStatus();
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        // 条件构造器
        LambdaQueryWrapper<Dish>  queryWrapper= new LambdaQueryWrapper<>();
        queryWrapper.like(name != null, Dish::getName, name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo, queryWrapper);
        log.info("pageInfo.getRecords().toString() = "+ pageInfo.getRecords().toString());
        // 对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records"); // 将pageInfo拷入disDtopage除了records属性除外
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    // 根据id查询菜品信息和对应的口味信息
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    @PutMapping
    @Transactional
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

       /* // 清理所有菜品缓存数据.
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);*/

        // 清理某个分类下面的缓存
        String key = "dish" + "_" + dishDto.getCategoryId()+ "_" + dishDto.getStatus();
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    // 根据CategoryId查询菜品数据
    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus, 1); // 查询状态为1（起售状态的菜品）
        // 排序
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }
*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;
        String key = "dish" + "_" + dish.getCategoryId()+ "_" + dish.getStatus();
        // 先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null) {
            // 如果㛮直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus, 1); // 查询状态为1（起售状态的菜品）
        // 排序
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            // 当前菜品ID；
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
                List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
                log.info("dishFlavorList = " + dishFlavorList.toString());
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库， 将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
    @PostMapping("/status/{status}")
    public R<String> togethersell(@PathVariable Integer status, @RequestParam List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null, Dish::getId, ids);
        List<Dish> list = dishService.list(queryWrapper);
        for (Dish temp : list) {
            temp.setStatus(status);
            dishService.updateById(temp);
        }
        if (status == 1) return R.success("菜品批量起售成功");
        return R.error("菜品批量停售成功");
    }


}
